linux-kernel - Re: [patch] build error: allnoconfig fails on mincore/swapper

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Date:	Wed, 14 Feb 2007 20:10:14 +1100
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Hugh Dickins <hugh@...itas.com>
CC:	Randy Dunlap <randy.dunlap@...cle.com>, tony.luck@...il.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [patch] build error: allnoconfig fails on mincore/swapper_space

Hugh Dickins wrote:
> On Wed, 14 Feb 2007, Nick Piggin wrote:
> 
>>Can't you have migration without swap?
> 
> 
> Yes: but then the only swap entry it can find (short of page
> table corruption, which isn't really the focus of mincore)
> is a migration entry, isn't it?

Just doesn't seem logical to have CONFIG_SWAP ifdef cover the
whole thing, regardless that it produces the desired result.

I'm going to submit a fixup patch to Linus covering all this
stuff, after making a more comprehensive test case (yes I
actually did test this patch with a few different cases before
submitting it, so I must have been unlucky with uninitialised
data).

If he wants to apply it rather than back out the patch entirely,
its up to him.

I don't think there is any reason to panic. I did completely
forget the result vector, but AFAIKS that's the only real bug
in it.

-- 
SUSE Labs, Novell Inc.
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